Discussion
What is offset drift?
Answer: B
Drift is the temperature coefficient of the offset voltage, quoted in microvolts per degree, and it matters because a nulled offset does not stay nulled as the equipment warms. Supply sensitivity, warm-up and unit-to-unit spread are three other specifications. Since offset can be trimmed to zero at one temperature but drift cannot be trimmed away, drift is the figure that limits a precision measurement over a working day.
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